Chem 238 Study guides, Class notes & Summaries

Chem_mark_2020_2H (1

GCSE COMBINED SCIENCE: TRILOGY 8464/C/1H Chemistry Paper 1H Mark scheme June 2020 Version: 1.0 Final Mark Scheme MARK SCHEME – GCSE COMBINED SCIENCE: TRILOGY – 8464/C/1H – JUNE 2020 2 Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates participate in and is the scheme which was used by them in ...

Tamu Chem 238 Final Exam Questions and Answers 100% Solved | Already Passed

Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. GCSE COMBINED SCIENCE: TRILOGY Higher Tier Chemistry Paper 1H H 2 *02* IB/M/Jun20/8464/C/1H 0 1 This question is about the extraction of aluminium. 0 1 . 1 An aluminium atom is represented as: Al 13 27 Give the number of electrons and neutrons in the aluminium atom. [2 marks] Number of electrons Number of neutrons Aluminium is extrac...

MARK SCHEME – GCSE COMBINED SCIENCE: TRILOGY – 8464/C/1H – JUNE 2020 2 Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant questions, by a panel of subject teachers. This mark scheme includes any amendments made at the standardisation events which all associates participate in and is the scheme which was used by them in this examination. The standardisation process ensures that the mark scheme covers the students’ responses to question...

CHEM-120 Unit 6 Discussion: Radiation – Option 2: Topic of Uranium-238 (GRADED)

AQA GCSE COMBINED SCIENCE TRILOGY :8464/C/1H June 2020 Version: 1.0 Final Mark Scheme

1. What does OSHA stand for? Occupational Safety and Health Administration 2. was created by the US department of labor to regulate and enforce safety and health standards to protect employees in the work place... 3. This regulates employee exposure to potentially toxic substances and inform employees about the possible hazards of materials used in the work place? 4. This requires that chemical manufacturers and im- porters assess and communicate the potential haz- ards associated with their ...

1. How many electrons can an s subshell hold? 2 2. How many electrons can a p subshell hold? 6 3. How many electrons can a d subshell hold? 10 4. Which subshells are available in the first energy level? 5. Which subshells are available in the second en- ergy level? 6. Which subshells are available in the third energy level? s s and p s, p and d 7. What is Hund's rule? (Think bus seats!) Every orbital in a sub- shell must be singly filled with an electron before any one orbital can be d...

1. Anthropogenic derived from human activities 2. Erosion The process by which wind, water, ice, or gravity transports soil and sediment from one location to another 3. Runoff Part of the water cycle where an excess of water runs down and does not sink into the soil and eventually makes it to the rivers, lakes, and oceans. 4. Denitrification process in which fixed nitrogen compounds are con- verted back into nitrogen gas and returned to the atmosphere 5. Nitrification ammonia (NH3) is conv...